Mechanical time-fuse.



Patented Sept. 12,1911.

K. WIESER.

MEGHANIGAL TIME FUSE.

APPLICATION FILED JULY 1, 1910.

; tio'nalforms-of'a mechanicaltime fuse structed according to th s 1ni "ent1on,i.a'nd

UNITED STATES PATENT KARL WIESER. F BREDENEY. GERMANY, ASSIGNOR TO FRIED. KRUPP AKTIEN- GESELLSCHAFT, OF ESSEN-ON-THE-RUHR, GERMANY. if

MECHANICAL TIME-FUSE.

Specification of Letters Patent.

Patented Sept. 12, 1911.

Application filed July 1, 1910. Serial No. 569,911.

To all whom it may concern:

Be it known that I, KARL "Wnasns, a subject of the Emperor of Germany, and a resident of Bredeney, Germany, have invented certain new and useful Improvements in MechanicalTime-Fuses, of which 'the followingis a specification.

This invention relates to mechanical time fuses the setting of which is effected by rotating an external part of the fuse, which external part is connected by a clutch, (which releases itself automatically and acts in both directions of rotation) to a locking disk which determines the instant of the release of the igniting apparatus. In known fuses of this kind the clutch consists of a tongue attached to the locking disk and an inwardly bent fiat spring attached to the external part of the fuse, and provided with a slot into which the tongue of the locking disk enters. During the flight of the projectile this spring bends outwardly under the action of centrifugal force and at the same time releases the tongue of the locking disk. The disadvantage of this clutch is that the adjustments ofthe fuse are easily rendered inaccurate. The spring may stretch or bend inward on the rotation of the outer. part of the fuse and according to the direction in which the rotation takes place. \Vhen the fuse is set, the revolving external part of the fuse advances beyond the locking disk, by the amount by which the spring has become,

lengthened or shortened, whereby errors in the setting of the fuse are caused.

Now the object of this invention is'to provide for mechanical time fuses of the kind hereinbefore mentioned, aclutch which will enable the fuse to be accurately set by means of the external revolving part thereof. This end is attained, according to this invention, by the use of a clutch in which both that member thereof WlllClllS mounted on the locking disk, and the lone mounted onthe. external lrevolving 'part of the fuse, is unyielding inthe direction'of rotatio {In the drawing-are shown two con provided with a clockwork movement. A

' Figures 1 to refertothe first constructional form, and of these figures Fig. 1 a' longitudinal section, (partly in elevation) through the fuse. Figs. 2 and3 each show,

on a larger scale, a longitudinal "section on; the fuse in its transport-state and after'fir; 5 ing respectively. Fig. 4 is asection on theline H of Fig. 2 and,Fig. 5 isJa section on the line 5-5 of Fig 6 to 9, which are drawn to the same scale as Figs.

2 to 5, refer to the second constructional form, and of these figures Figs. 6 and 7 show sections correspondingjto Figs. 2 and 3. Fig, 8 is a detail. and Fig. 9"is=a section .65

on the line 9--S) of Fig. 6 looking from above. i ,ii a The first constructional,form of, the in; vention will be described first,

A denotes, the loclring'tlislc which determines the instant of the zreleas e. ofQt-he igniting apparatus, and can be, rotated by the clockwork in the direction of the arrow m. (see- Figs. 4 and 5). and B is the external revolving part of the fuse ,wliich is mad in '75 the shape of a cap. The capiB'iscoupled to I the locking disk A by a tongue Mattached to the locking disk A, and proje'ctingradially beyond the periphery of the locking disk, and which. when the fuse isin the transportstate, enters without. lateral play, into a slot 0 (see Fig. 4) ma bolt C which is movably mounted in, the cap in'tliei manner shown in the drawing. Both ,the' tongue at and the limb of the fork formed by the slotare made of such a strength that they do not yield in the direction of rotation when the cap is rotated. One limb' of the fork is provided with a lateral open} ing 0 through which the tongue (1 can emerge when the bolt C is in they position shown in Fig. 3, and when the locking disk rotates in the direction of the arrow at (see Fig. 5).

Above the slot 0 the bolt Chas alongiagainst the lower end of a sleeve D rigidly inserted in thecap B andrec'eivm the up "f pet-end of the boltii "In the stem 0 the bolt' which "is, surrounded by the SlQBVQ IS' CUt a .slot 0 which contains a V shape'd bent spring o. This latter is attached to "the"- bolt by means of a pin 0. Its upper laterally bent ends bear,'in the transport posltion of the fusefupon' the upper end of the sleeve D, and thus prevent. any movement of the bolt C during transport.,-

Since both the tongue a' -and the bolt-C do not yield in the direction of rotation of the cap B the locking disk will be rotated, during the adjustment of the fuse made by rotating the cap B, through exactly the same angle as the capB, so that errors cannot arise in the setting of the fuse.

On firing, the bolt 0 moves into the position shown in Fig. 3 under the action of inertia. At the sametime the spring 0 contracting is withdrawn into the sleeve D, and the opening 0? in the bolt comes in front of the tongue a of the locking disk A. At the same time the clockwork comes into action, and causes the locking disk A to rotate in the direction of the arrow a: (see Fig. 5). This can take place unhindered'as the tongue a can now emerge from the slot 0 in the bolt C through the opening 0 The second constructional form of the fuse shown in Figs. 6 to 9 differs from the first one only by the formation of the member of the clutch mounted on the capB. This member consists of a lever E, which is mounted on the free end of a flat spring F secur'edto the cap B and forms one limb of a trip .catch. The free end of the lever E is forked (see Fig. 9). The limbs of the fork embrace, when the fuse is in the transport position (see Fig. 6), the tongue a of the locking disk A'of the fuse without lateral play, and, like the corresponding parts ofthe bolt C in the first constructional form.

are made of such a strength that they willnotyield in the direction of rotation of the cap B. The front of the other end ofthe lever lies, in the transport state of the fuse,

snugly against the inner wall of the cap B.

Since the cap B and locking disk are unyieldingly coupled in the direction of rotation of the cap by the lever E and the tongue a no errors in the setting of the fuse can arise in the second" constructional form either. a On firing the lever is tilted downward under the action of inertia. The flat spring F is at the same time first lifted from the wall of the cap, and then approaching the wall of the cap again, forces the lever, afterit has overstepped the tilting position, (see Fig. 7, dotted position), into the position shown in Fig. 7 by full lines, in which the lever releases the locking disk A.

What is claimed is 1. A mechanical time primer having an outerpart for effecting adjustment, :1 rotatable member which effects the release of the priming mechanism and a non-yielding coupling between the rotatable mei'nber and said outer-primer part said coupling comprising a slidable bolt forwardly inclined at an acute angle to the longitudinal axis of the fuse, carried by the outer primer part and L! adapted to be released through inertia o n firing to disconnect the coupling and permit of rotation of the rotary member. 2. A mechanical time-primer having an outer primer part for effecting adjustment,

. a rotatable member which effects the release of the priming mechanism, and a non-yielding coupling between the rotatable member.

and said outerprimer part, said coupling comprising a slidable bolt carried by the outer primer part and adapted to be re leased through inertia on firin to disconnect the coupling and permit 0 rotation ,of

the rotary member. d j v u 3. A mechanical timepmmer having an outer primer part for eiiectin' adjustment,

a rotatable member which e ectsthe release of the priming mechanism, and a nonyielding coupling between the rotatable member and said outer primer part, said coupling comprising a forked and slidable bolt carried by the outer primer part, and hav ing. one of its fork members provided with a lateral opening, and a tongue carried by the rotatablev member adapted to engage within said fork and hold the rotatab e member, against rotation, said bolt adapted to be released through inertia on firing and bring the lateral opening of the fork member adjacent the tongue to disconnect the coupling and permit of rotation of the rotary member.

4. A mechanical time-primer having an outer primer part for. effecting adjustment, a rotatable member which effects the release .of the priming mechanism, and a non-yielding coupling between the rotatable member and said outer primer part, said coupling comprising a slidable bolt carried by the outer primer part, and having a lateral opening, a part carried by the rotatable member adapted to engage with the bolt and hold said rotatable member against rotation, said bolt adapted to be released through inertia on firing tobring the lateral opening thereof in position adjacent the rotatable member part and permit of rotation of the rotatable member, and a pin passing transversely through the bolt and holding the same against rotation and determining the extent of itsmovement.

5. A mechanical time-primer having an outer prin1er part for effecting adjustment,

a rotatable member which eflects the'release of the priming mechanism, and a non-yield ing coupling between the rotatable member and said outer primer part, said coupling comprising a casing mounted within an aperture in the outer priming part, a forked bolt slidable within the casing, a spring carried by-the bolt and adapted to engage with the casing and hold said bolt .in position, a tongue carried by the rotatable member and adapted to engage within the fork of the bolt and hold the rotary member against rotation, one of the fork members having a The roregoing snecification si ed at Barlafterai slot fiCilPtifiO lgaelrrnit gi'the (li'eieass men, Ciermany, tins 14th any 0 june, 1910. 0 the tongue rom e 0 t sai bolt a apte to disconnect its engagement with the casing KARL 5 through the inertia of the bolt on firing, and In presence of bring the slot portion adjacent the tongue CHAS. J. WRIGHT, and permit of rotation of the rotary member. WALTER VONNF'GUT. 

